Why is it?

Why is it that women only grow hair on the chins after they need glasses to see anything?
Why is it that some lace up shoes are designed to be worn by older people who cannot bend down to do them up?
Why is it that the new phone book is smaller to save paper but you cannot read it even when wearing glasses?
Why is it that when I cannot hear what people are saying to me I just say, "Yes."
Why is it that the older I get the more difficult it is for me to remember what I said two minutes ago?
Why is it that doctors who look about 12 years old keep saying, "At your age."?
Why is it that the child of my loins says that I think too much when really I am just trying to work out how the world works these days?
As Professor Julius Sumner Miller always said, "Why is it so."?